Matt Hunt said he was "very proud" of his son because when the boy gets an idea, he keeps his head down and gets on with it, and he really does want to do some good and stop young kids from getting asthma.

马特·亨特表示，他对儿子感到“非常自豪”，因为当他有想法时，他会埋头坚持下去，他真的想做一些好事，让孩子们不再染上哮喘。

youdao

He keeps his opponents guessing what he would do next.

他使他的对手猜不着他下一步要干什么。

《新英汉大辞典》

He keeps his head down as his mother blames him.

他母亲谴责他时，他始终低着头。

youdao

He is considered nosey. Someone who keeps his nose to the grindstone works very hard.

VOA: special.2009.09.13

Orpheus devotes himself to his beautiful poetry, and he keeps himself sexually abstinent.

俄耳甫斯致力于写优美的诗歌，在性方面保持节制。

耶鲁公开课 - 弥尔顿课程节选

By that he means he keeps his blast furnace and rolling mills running as much as possible.

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His opponents hope he keeps his word and gives them a chance at the executive mansion.

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Since he keeps his documents online, his paper files now occupy a single file drawer.

WSJ: Warming Up to the Officeless Office